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Finding the Fourth Proportional to 637.68, 879.99 and 357.90

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Solution

The fourth proportional to 637.68, 879.99 and 357.90 is: 493.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.68 : 879.99 = 357.90 : x
  2. Step 2: Convert to fraction form
    637.68/879.99 = 357.90/x
  3. Step 3: Cross multiply
    637.68x = 879.99 × 357.90
  4. Step 4: Simplify right side
    637.68x = 314,948.42
  5. Step 5: Solve for x
    x = 314,948.42/637.68
  6. Step 6: Final answer
    x = 493.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.